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This document provides a comprehensive overview of flight operations and noise levels associated with aircraft overflights in the City of Sunnyvale during the fourth quarter of 2025. It is intended for use by local authorities, residents, and aviation enthusiasts interested in understanding the impact of aircraft noise on the community. The report includes data collected from various noise monitoring terminals (NMTs) and details the types of aircraft operating in the area, their noise levels, and the times of day when overflights occur. The information is presented in a transparent manner, allowing stakeholders to assess the effects of aviation on local noise levels without interpretation from the City of Sunnyvale.

• In Q4 2025, there were 9,906 daytime flights, 1,161 evening flights, and 695 nighttime flights over Sunnyvale.
• 88% of RNP approaches to SJC were captured by the noise monitoring system.
• The peak day for South Flow approaches was November 16, 2025.
• The average altitude for RNP approaches was 3,136 feet.
• The maximum noise level recorded for RNP approaches ranged from 55-84 dBA.